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numbat alternatives

Curated alternatives to numbat — and why you'd switch.

agentsight

System-level observability for AI agents via eBPF and TLS tracing: correlates prompts and model calls with the processes, files and network the agent actually touched — no SDK, no proxy.

Why switchBoth sensors for what a coding agent did on the box. Numbat cooperates with the harness — hooks, OTLP logs, session artifacts; AgentSight is harness-agnostic, tracing eBPF and TLS so it works on any binary, including ones with no hooks.
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failproofai

Observability plus policy enforcement for agent harnesses: records every run across 12 harnesses (Claude Code, Codex, Cursor, Hermes…) and blocks dangerous tool calls with 39 built-in policies.

Why switchBoth normalise coding-agent hooks and session artifacts into one record. Numbat is Perplexity's sensor — observe and ship OTLP; Failproof AI observes and also blocks, with a policy engine and a local dashboard.
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Adrian

Runtime security for AI agents: watches actions AND reasoning traces to catch prompt injection, tool poisoning and out-of-remit behavior — blocking before the action lands. SDKs + Claude Code plugin.

Why switchBoth do runtime security for agents, with opposite epistemologies. Adrian reads the reasoning trace to catch injection semantically; numbat is deterministic — CEL rules over a normalized endpoint event model, emitting versioned NDJSON and case bundles built for an incident responder.
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agent-beacon

Cross-harness memory for coding agents: captures sessions from Claude Code, Cursor, Codex and 20+ harnesses, distills reviewed knowledge over MCP/skills, and forwards telemetry to SIEMs.

Why switchOn the security side both are endpoint sensors normalizing agent hooks, OTLP and session artifacts into one event model; numbat adds CEL matching and pre-action blocking, Beacon forwards to your SIEM and doubles as memory.
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Guardrails

NVIDIA's programmable guardrails for LLM apps: input, output, dialog and retrieval rails defined in Colang, wrapping any model or LangChain runnable.

Why switchTwo places to put the control. NeMo Guardrails runs inside the app as programmable input, output, dialog and retrieval rails you author per application; numbat runs outside it on the host, so it also sees the agents nobody wired guardrails into.
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